'indignation' originates from Latin, specifically the word 'indignatio,' where 'in-' meant 'not' and 'dignus' meant 'worthy.'

'indignatio' transformed into the Old French word 'indignacion,' and eventually became the modern English word 'indignation' through Middle English.

Initially, it meant 'unworthy or disgraceful,' but over time it evolved into its current meaning of 'anger at something perceived as unjust.'